Journal ArticleDOI
Digital speckle-pattern interferometry as a full-field fluid-velocimetry technique.
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TLDR
A novel fluid-velocimetry technique based on speckle interferometry that provides information about the velocity field for an out-of-plane component of a Rayleigh-Bénard convective flow is presented.Abstract:
We present a novel fluid-velocimetry technique based on speckle interferometry. The light scattered from an illuminated plane is recorded with a CCD camera at the same time as a speckled reference beam. Substraction of two nonsimultaneous frames provides information about the velocity field for an out-of-plane component. An application to a Rayleigh-Benard convective flow is given.read more
Citations
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REVIEW ARTICLE: Holographic particle image velocimetry
TL;DR: In this paper, the state-of-the-art of digital particle holography is reviewed to allow estimates of its future in experimental flow analysis, and the practical advantage of video and digital techniques over photographic recording is obvious.
Journal ArticleDOI
Holographic particle image velocimetry
Klaus D. Hinsch,Sven F Herrmann +1 more
TL;DR: In this paper, the state-of-the-art of digital particle holography is reviewed to allow estimates of its future in experimental flow analysis, and the practical advantage of video and digital techniques over photographic recording is obvious.
Journal ArticleDOI
Intrinsic speckle noise in off-axis particle holography.
TL;DR: A mathematical model that relates the first- and second-order statistical properties of the intrinsic speckle noise to relevant holographic system parameters is constructed and shows that the noise-limited information capacity can be expressed as the product of particle number density and the extent of the particle field along the optical axis.
Journal ArticleDOI
Digital speckle pattern interferometry as a holographic velocimetry technique
TL;DR: In this paper, a digital speckle pattern interferometry (DSPI) as a digital image plane holography (DIPH) technique is presented and its potential for fluid velocimetry is discussed.
Journal ArticleDOI
Fast visualization of corrosion processes using digital speckle photography
TL;DR: In this article, the authors show the feasibility of using nonintrusive optical techniques to determine surface changes associated with corrosion processes even when they are very small and to obtain complementary information to the conventional electrochemical measurements.
References
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Journal ArticleDOI
Stereoscopic particle image velocimetry applied to liquid flows
Ajay K. Prasad,Ronald J. Adrian +1 more
TL;DR: In this article, a twin-camera stereoscopic system was developed to extend conventional high image-density Particle Image Velocimetry (PIV) to three-dimensional vectors on planar domains.
Journal ArticleDOI
Stereoscopic particle image velocimetry
M. P. Arroyo,Clive A. Greated +1 more
TL;DR: In this article, a set-up has been devised to take two stereoscopic images of the flow simultaneously with only one camera, thus making automatic recording of three-dimensional (3D) velocity fields quite straightforward.
Journal ArticleDOI
Rayleigh-Bénard convection in a small box: spatial features and thermal dependence of the velocity field
M. P. Arroyo,J. M. Savirón +1 more
TL;DR: In this paper, an experimental study of the spatial features of Rayleigh-Benard convection in a sall box is presented, where experiments are carried out in a rectangular cell (aspect ratios Γx = 2.03, Γy = 1.19) filled with silicone oil (Prandtl number, Pr = 130) for different Rayleigh numbers, Ra (up to Ra = 75Rac, Rac1707).
Journal ArticleDOI
Velocity measurements in a convective flow by holographic interferometry
TL;DR: A holographic interferometry technique has been developed that can be used to measure the three components of the velocity field in a whole plane of a fluid flow simultaneously.